论文标题
电荷颗粒反应在超新星和中子星对R过程中的重要性
The importance of charged particle reactions in the r-process on supernovae and neutron stars
论文作者
论文摘要
我们提出了一种具有动态产生的$（p，xn）$机制，作为一组新的核反应，可以产生高密度中子并解释RP和RP元素。我们计算了我们提出的机制产生的th和铀的速率，并表明它与爆炸性事件中的不同恒星条件兼容，在$ t \ geq 3 \ geq 3 \ times 10^{9} k $的初始温度下，中性驱动的风与“冻结”。我们表明，带电的粒子反应可以解释$ {}^{232} th $和$ {}^{235,238} u $ nucleochronometers的差异。我们通过表明$（p，xn）$反应可能有助于重度稳定中子不足核素的核合成，例如$ {}^{190} pt $，$ {}^{184} os $，$ {184} os} $ {}^{174} $ hf。这意味着对RP过程的更广泛的定义，对重元素的核合成产生了重要影响。我们表明，我们不需要假设超中子核的滴水线极端条件。
We propose a $(p,xn)$ mechanism with dynamic production as a new set of nuclear reactions that could produce high density neutrons and explain the r- and rp-elements. We calculate the rate of thorium and uranium produced by our proposed mechanism and show that it is compatible with different stellar conditions found in explosive events at an initial temperature of $T \geq 3\times 10^{9} K$ with a "freeze-out" by a neutrino-driven wind. We show that charged particle reactions could explain the discrepancies in the abundances of ${}^{232}Th$ and ${}^{235,238}U$ nucleochronometers. We extend the endpoint of the rapid proton (rp) process far beyond the previous work by showing that $(p,xn)$ reactions could contribute to the nucleosynthesis of heavy stable neutron deficient nuclides, like ${}^{190}Pt$, ${}^{184}Os$, ${}^{180}W$ and ${}^{174}$Hf. This implies in a broader definition of the rp-process and has important consequences for the nucleosynthesis of heavy elements. We show that we did not need to assume an extreme condition for the drip line of super neutron-rich nuclei.
